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authorMichael Halcrow <mhalcrow@us.ibm.com>2009-01-07 01:42:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 02:59:22 +0300
commit87c94c4df0149786ad91d8a03c738a03369ee9c8 (patch)
tree6b7ee0b3c3e15d94fdeccb59e8bfab6c9d2a4498 /fs/ecryptfs/messaging.c
parentaddd65ad8d19a7d7982130b16f957d5d01d3f8df (diff)
downloadlinux-87c94c4df0149786ad91d8a03c738a03369ee9c8.tar.xz
eCryptfs: Filename Encryption: mount option
Enable mount-wide filename encryption by providing the Filename Encryption Key (FNEK) signature as a mount option. Note that the ecryptfs-utils userspace package versions 61 or later support this option. When mounting with ecryptfs-utils version 61 or later, the mount helper will detect the availability of the passphrase-based filename encryption in the kernel (via the eCryptfs sysfs handle) and query the user interactively as to whether or not he wants to enable the feature for the mount. If the user enables filename encryption, the mount helper will then prompt for the FNEK signature that the user wishes to use, suggesting by default the signature for the mount passphrase that the user has already entered for encrypting the file contents. When not using the mount helper, the user can specify the signature for the passphrase key with the ecryptfs_fnek_sig= mount option. This key must be available in the user's keyring. The mount helper usually takes care of this step. If, however, the user is not mounting with the mount helper, then he will need to enter the passphrase key into his keyring with some other utility prior to mounting, such as ecryptfs-manager. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Dustin Kirkland <dustin.kirkland@gmail.com> Cc: Eric Sandeen <sandeen@redhat.com> Cc: Tyler Hicks <tchicks@us.ibm.com> Cc: David Kleikamp <shaggy@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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